Printing-machine.



M. ROSENFELD.

PRINTING MACHINE.

APPLICATION FILED OOT.11, 1911.

Patented May 26, 1914.

4 SHEETS-SHEET 2.

M. ROSENPELD. PRINTING MACHINE.

APPLICATION FILED OCT. 11, 1911.

1,098,056. Patented May 26, 1914.

v 4 SHEETS-SHEET 3. 5

74 Egg ventor COLUMBIA LANOGRAPH CO1, WASHINGTON. D. C.

M. ROSENFELD.

PRINTING MACHINE.

APPLIGATION'IILED 001.11, 1911.

1,098,056. Patented May 26, 1914.

4 SHEETS-SHEET 4.

Amt/QM 1% coLummA PLANOGRAPII CO..WASHINGTUN, u. c.

ED STATES PATENT OFFICE.

MAURICE ROSENFELD, OF NEW YORK, N. Y.

PRINTING-MACHINE.

To all whom it may concern:

Be it known that I, MAURICE RosENrnLn, a citizen of the United States,and a resident of New York city, borough of the Bronx, and State of NewYork, have invented certain new and useful Improvements in Printing-Machines, of which the following is a specification.

My invention relates to printing machines utilizing a iD-roller with anengraved plate, and printing upon a continuous ribbon or tape.

The objects I have in view are to equally space the impressions upon theribbon or tape by means operating independently of the bed or platen ofthe press; to make such mechanism simple and easily accessible, and tomake the feed entirely automatic.

A further object is to provide means for keeping the reels of printedribbon distinct from one another.

These and further objects will more fully appear from the followingspecification and accompanying drawings, considered together orseparately.

In the drawings, Figure 1 is a plan View of an apparatus embodying myinvention. Fig. 2 is a longitudinal sectional view of the same takenupon the line 2-2 of Fig. 1. Fig. 3 is a front elevation of the same,but with the D-roller in the position shown by dotted lines in Fig. 2.Fig. l is a partial sectional view, taken on the line 4.4l of Fig. 5.Fig. 5 is an end view of the same. Fig. (3 is a sectional view of thebearings for the gripper shaft. Fig. 7 is a diagrammatical view of theoperating parts at rest in the position they assume before printing.Fig. 8 is a similar view, showing the parts at the beginning of movementto the printing position and while the ribbon is being fed across theD-roller. Fig. 9 is a similar view, showing the parts in position whiledrawing the ribbon from the reel and winding it upon the spool. Fig. 10is a detailed longitudinal section of the take-up shaft; and Fig. 11 isa cross-section of the same.

In all of the views like parts are designated by the same characters ofreferences.

The press comprises the usual platen or bed carrying the printingsurface and the usual D-roller, the ribbon passing around the latter andbetween it and the bed. The D- roller is given a partial revolution,engaging the ribbon with the printing surface, and then a partialrevolution in the opposite Specification of Letters Patent.

Application filed October 11, 1911.

Patented May 26, 1914.

Serial No. 654,021.

direction, thus making a double impression and a clear printing. Whilethe flat portion of the D-roller is opposite the bed and there IS aspace between the two, the ribbon is fed forward for another impression.The invention relates to the feeding mechanism.

The frame 1 of the press is of the usual type, having standards 2 whichcarry bearings 3 for the D-roller 4. Below the D-roller is the usualplaten or bed 5 sliding on the frame and supported upon rollers 6. Theplaten is moved in one direction by means of a cam 7 on the D-rollerwhich engages with a cam 8 on the platen or bed, and is moved in theopposite direction by means of a strap 9 connected to a weight (notshown). A printing surface 10 is carried on the bed and may be of thecharacter usually employed for this purpose. The ribbon is sup ported sothat it travels over the bed or platen, and between the latter and theD- roller. The printed ribbon is either wound upon a reel above and tothe back of the D- roller, or passes to a basket or other receptacle.The embodiment chosen for illustration has six separate ribbons whichare simultaneously printed; the number may be diminished or increasedwithout changing the principle of the invention.

11 is a reel of unprinted ribbon or tape 12. In some situations thisreel may not be employed; the supply of ribbon or tape being taken froma basket or other receptacle. The ribbon passes over the platen, asshown, and leads through a staple 13. This staple is secured to a bar14: attached to the back or flat side of the D-roller. The staple is ofsuch a size that it makes a tight fit with the ribbon sufliciently tomove the ribbon and rotate the reel 11 when the latter is used, or whennot employed, to lift the ribbon out of its receptacle. It is, ofcourse, understood that where a plurality of ribbons is used, as shown,that there is a staple for each ribbon. The ribbon passes over the camface of the D-roller and extends through a guiding staple 15, whichmakes a loose fit with the ribbon. This staple is supported upon a bar16 attached to the curved surface of the D-roller. Any means ofattachment may be employed for the bar, and it is desirable that the barshall be adjustable in position along the surface of the D-roller toaccommodate different feeds. The ribbon next passes from the Drolleraround a roller 17. This roller is for the purpose of moving and windingthe ribbon and is preferably rubber covered. The ribbon is next woundupon a spool 18 supported upon a shaft 19. \Vhen certain kinds of inkare used which do not dry rapidly, the rib bon cannot be immediatelywound. In this situation the spool is dispensed with and the shaft 19directly engages with the surface of the roller 17, the ribbon beingpinched between the two and drops down where it can be caught in abasket or other receptacle. The roller 17 is mounted in bearings 20,which in turn are supported on arms 21. These arms are carried upon ashaft 22 mounted on brackets 23 carried by the standard 2.

The device for feeding and determining the amount of ribbon which isnecessary for each impression, consists of a positive gripping mechanismadapted to be engaged at the pro-per time with the ribbon. This grippingmechanism is supported in bearings 24, the mechanism being supported onthe gripping shaft 25. This gripping shaft carries a gripping plate 26,having teeth 27. On one end of the shaft is a wiper 28, shown in theembodiment chosen for illus tration as in the form of a roller. Thebearings 24 are mounted on housings 29, one of these housings beingsolid and the other hollow to permit the shaft 25 to extend through it.The shaft 25 is mounted in such relation to the roller 17 that upon theshaft being partly rotated the teeth of the gripping plate may be causedto engage with the surface of the roller. This partial rotation of theshaft is made by the engagement of the wiper 28 and a cam 30. This cam30 is carried by the D-roller. It is adapted to be engaged with thewiper by the rotation of the D-roller, causing the cam to come incontact with the wiper, rotating the latter and carrying the gripperinto contact with the ribbon, pressing the same against the roller 17and preventing retro grade movement. The further movement of the cam 30in relation to the wiper 28 is a sliding movement, the wiper notresponding in a rotary direction more than enough to engage the gripperwith the roller 17 with sufficient pressure to prevent retrogrademovement of the ribbon.

For the purpose of guiding the ribbon to the roller 17, it passesthrough a staple 31, which is carried by a frame 32, which in turn iscarried by arms 21. For the purpose of disengaging the gripper from theribbon, a spring 33 is provided, engaging with the gripper plate at oneend and wit-h the frame 32 at the other. This spring is of thecompressing type, 27. 6., it is expanded by the action of the cam andwiper, and its elasticity causes it to assume its normal contractedform. For the purpose of limiting the movement of the gripper, anadjustable screw 34 is provided, one end engaging the gripper plate,when at its extreme retracted position.

For the purpose of permitting the feeding mechanism to be elevated forexamination and repair, the parts described are mounted upon a swingingsupport. This support comprises a pair of arms 35 mounted on the shaft22, which in turn carries arms 36.

These arms 36 support the shaft 19. The

connection between the arms 35 and 36 is by means of a shaft 37. Thearms 35 and 36 are separated by means of a spring 38.

For the purpose of separating the spools of wound and printed ribbon andto cause them to wind easily upon their spools, division plates 39 areprovided, said plates being pivoted to the shaft 37. These plates havenotches which engage the shaft 19, as shown, and are held in place bygravity. An arm 40 on one end of the shaft 22 is rovided for holding theroller 17, shaft 19 and wiper in place and for imparting the necessarypressure of the wiper upon the cam 30. A spring 41 holds this armdownward. For limiting the movement of the shaft 22, caused by thetensionof the spring 41, an arm 42 is mounted on the end oppo site fromthe arm 40, and this arm 42 carries an adjusting screw 43, which engageswith a lug 44 on the standard 2. These parts are normally in theposition shown in full lines in Fig. 2, but by twisting the shaft 22(spring 41 having been disconnected) the parts may be raised to thedotted line position shown in Fig. 2, rendering the rollers and grippingmechanism readily accessible.

The means for imparting tension to the roller 17 are as follows :Thisroller is mounted upon bearings 45 (see Fig. 4) on a stub-shaft 49. Adrum 46 is carried on the same stub-shaft, by bearings 48, adjacent toone end of the said roller. In this drum is a spiral spring 47. Thebearings illustrated are ball-bearings, which I prefer, as they may beadjusted with a minimum of lost motion, and require little lubrication,so that the ribbon will not become soiled, as is the case where plainbearings are used. The stub-shaft is carried on one of the arms 21. Aband, string or wire 50 is secured to the D-roller and also to the drum46 and is wound one or more times around the latter. One end of theroller 17 is provided with ratchet teeth 51 and a pawl 52 on the drum 46engages with these teeth. I prefer to make the drum 46 slightly smallerthan the roller 17 for a purpose to be described. The shaft 19 is somounted on the arms 36 as to be readily removable therefrom, the detailsbeing shown on Figs. 10 and 11. The bearing boxes are provided withnotches as shown, and blocks 53 engage in these notches and hold theends of the shaft in position. Spring clips 54; secured to the blocksfrictionally engage with the bearing boxes and hold the blocks inposition.

The D-roller is operated by the usual handles 55, secured to the shaft56. The D-roller has the usual pad 57. The cam 30 is secured to theD-roller so as to move in time therewith by means of a dove-tailed blockshown on Fig. 3. By means of this block the cam may be removed and adifferent one, with a face of more or less extent, substituted.

The operation of the entire apparatus is as follows: A supply of ribbonis mounted upon the reel 11 and led through the staple 13 around theface of the D-roller, through the guide staples 15 and 31, and over thefeed roller 17 The ribbon may then be wound upon the spool 18, or ifdesired, may be simply pinched between the roller 17 and shaft 19. Thisoperation is repeated with the additional ribbons, so that there will besix ribbons side by side in the apparatus. In printing, the printingsurface is inked in the usual manner and the D- roller makes a partialrevolution and returns. This gives the usual double impression upon theribbon.

The operation is best shown in Figs. 7, 8 and 9. The beginning of theoperation is shown in Fig. 7, the printing surface having been inked anda surplus of ribbon wound upon the spool 18 and stretched smoothly overthe D-roller. The D-roller is turned first in the contraolockwisedirection, as in Fig. 8. The roller 17 is prevented from rotating andthe ribbon in contact with the surface of this roller is held againstfurther retrograde movement by means of the gripper, which is caused toengage with the ribbon by means of the cam 30, engaging with the wiper28, thus twisting the shaft 25. The ribbon being anchored in contactwith the rollerv 17 and the D-roller continuing to move the ribbon willslide through the staple 13. The cam slides along the face of the wiper28, preventing backward rotation of the latter and holding the gripperin contact with the ribbon and the roller 17. The gripper remains inthis position until the cam passes its total working length in contactwith the wiper 28. As soon as it dise'ngages, the spring 33 willdisengage the gripper from the ribbon and hold it in contact with thestop 34. The roller 17 will be now free to rotate, and with it theribbon will be moved. The ribbon will then receive its first printingbetween the face of the D- roller and the printing surface 10. Theribbon or tape between the D-roller and the reel 11 will now be slackand rest on the platen. WVhile the D-roller is rotating, the wire willrotate the drum 16 against the tension of the coiled spring 47, thepawl57 at the same time will pass idly over the ratchet teeth. Duringthat portion of the movement of the D-roller after the cam 30 hascleared the wiper 28, the movement of the drum 46 will be slightlyfaster than the movement of the roller 17, owing to the fact that in theembodiment chosen for illusstration, the wire and ribbon both beingmoved by contact with the curved surface of the D-roller will move atthe same rate of speed, and the roller 17 being moved by engagement ofthe. ribbon and being larger than the drum willbe moved slower. As aresult of this, the spring will be wound up slightly in excess of theamount of ribbon moved over the roller 17. The object of this is toaccommodate lost motion between the ratchet wheel 51 and pawl 52.

On the return movement of the D-roller, as shown in Fig. 9, the pawl 52will engage with one of the ratchet teeth 51 and the spring 47 uncoilingwill tend to rotate the roller 17 in the reverse direction. This willwind up the ribbon on the spool 18 as fast as it is moved to it by theD-roller. When the cam 30 comes in contact with the wiper 28, it willhave no other effect than to slide upon the periphery of the latter,tending to rotate it in the contraclockwise direction, and will merelytend to move the gripper plate in the same direction as it is moved bythe spring 33 which has been holding the gripper in contact with thestop 34:. The printed ribbon will continue to be wound up on the spool18, solong as the D-roller continues to move in the clockwise direction.On again moving the D-roller in the contraclockwise direction, theribbon will be fed as before.

It is apparent from the foregoing description that the ribbon isautomatically fed on the D-roller toward the roller 17 by means of theD-roller, the staple 13 thereon and the roller 17 and the gripper 27.

As described, a certain length of ribbon is advanced over the bed by theclockwise movement of the D-roller, the ribbon being fed by thefrictional contact of the staple 13 with the ribbon, and the supply thusfed being taken up by the roller 17 actuated by the spring 47. Thislength of ribbon thus advanced is greatly in excess of that subsequentlyto be fed, a. 6., it is greater than the distance which is to separatethe several impressions. On the reverse movement of the D-roller, aportion of the ribbon that has been fed to the roller 17 is drawn back;the gripper acting for a determined period of time during the movementof the D-roller prevents all of this ribbon previously fed by theclockwise movement of the D-roller from being fed backward. This amount,which may be measured by the angular length of the effective surface ofthe cam 30,

when reduced to the radius of the D-roller, constitutes the feed. It isapparent that by removing the cam and substituting one of differentangular distance, the feed of the ribbon may be increased or decreased.

It is understood that the wiper 28 is shown complete merely for thepurpose of illustration, and is not necessarily an entire circle.

. T he wiper 28 is elastically engaged with the cam 30 by means of thespring 41, so that the wear of the two surfaces is properly compensatedfor.

In accordance with the provisions of the patent statutes, I havedescribed the principle of my invention, together with the apparatuswhich I now consider to represent the best embodiment thereof; but Idesire to have it understood that the apparatus shown is merelyillustrative and that the invention an be carried out in other ways.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A D-roller printing press having, in combination with the D-roller, afeeding roller, means for engaging a ribbon with the D-roller and alsowith the feeding roller, and means controlled by the movement of theD-roller for arresting retrograde movement of the ribbon, said meansengaging the ribbon with the feeding roller.

2. A D-roller printing press having, in combination with the D-roller, afeeding roller adapted to be turned in one direction by a ribbonactuated by the movement of the D-roller, a spring for turning thefeeding roller in the other direction, a gripper adapted to grip theribbon against the feeding, roller, and connections between the gripperand the D-roller for actuating the gripper.

3. A D-roller printing press having, in combination with the D-roller, afeeding roller, a drum, a pawl and ratchet connection between thefeeding roller and the drum to permit the roller to turn freely in onedirection, a spring for rotating the drum in the opposite direction, aconnection between the D-roller and the drum, and a gripper to grip theribbon against the feed ing roller, said gripper being actuated by theD-roller.

4. A Droller printing press having, in combination with the D -roller, afeeding roller, a gripper adapted to grip the ribbon against the feedingroller, a wlper for engaging the gripper and a cam on the D- roller foractuating the wiper.

5. A D-roller printing press having, in combination with the D-roller, afeeding roller, a gripper engaging therewith, said gripper being mountedupon an arm, a spring for holding the arm in position, a wiper turningwith the gripper and a cam on the D-roller engaging with the wiper, thespring yieldingly engaging the wiper with the cam.

6. A D-roller printing press having in combination with the Droller, afee ing roller, a gripper engaging with the said feeding roller, awind-up roller engaging with the feeding roller, the said feeding rollerand gripper being carried upon a pivoted frame, a wiper turning with thegripper, and a cam on the D-roller and a spring engaging with the framefor yieldingly engaging the wiper with the cam, the said frame alsobeing capable of turning on its .pivot for being elevated for inspectionof the feeding roller.

7. A D-roller printing press having, in combination with the D-roller, apivoted frame having two sets of arms, a feeding roller and a grippermounted on one set of arms, and a set of arms mounted on the second. setof arms and carrying a wind-up roller, a spring for engaging the Wind-uproller with the feeding roller, a Wiper on the gripper, a cam on theD-roller, and a spring on the frame for yieldingly engaging the wiperwith the cam.

8. A D-roller printing press having, in combination with the D -roller,a feeding roller, a gripper engaging with the feeding roller, a stapleon the D-roller for frictionally engaging with the ribbon, and meansactuated by the D-roller for engaging the gripper.

This specification signed and witnessed this 28th day of September,1911.

MAURICE ROSENFELD.

Witnesses JOHN L. LoTsoH, Gno. J. HANSON.

flopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

